It is no coincidence that these elaborate texts are often addressed to
the brahmins, who were the self-proclaimed spiritual leaders of the
time. The brahmins were the custodians of the most sophisticated texts
in ancient India up to this time, the Vedic literature. It seems that
one aim of the Dīgha was to impress such learned men.

There also this introduction on Access to Insight (which cites Bhikkhu Bodhi and Joy Manné):

The "Long" Discourses (Pali digha = "long") consists of 34 suttas,
including the longest ones in the Canon. The subject matter of these
suttas ranges widely, from colorful folkloric accounts of the beings
inhabiting the deva worlds (DN 20) to down-to-earth practical
meditation instructions (DN 22), and everything in between. Recent
scholarship suggests that a distinguishing trait of the Digha Nikaya
may be that it was "intended for the purpose of propaganda, to attract
converts to the new religion."1

Bhikkhu Bodhi, Connected Discourses of the Buddha (Somerville, Mass.: Wisdom Publications, 2000), p.31, referring to Joy Manné's
"Categories of Sutta in the Pali Nikayas and Their Implications for
Our Appreciation of the Buddhist Teaching and Literature," Journal of
the Pali Text Society 15 (1990): 29-87.

Is there evidence (such as contradictions with other suttas) suggesting the Buddha did not speak the Digha Nikaya?

In there any evidence in the suttas where the Buddha said he would teach a different modified Dhamma ("propaganda") merely for the purpose of converting Brahmins & other outsiders?

Is there any evidence in the suttas showing the Buddha was "flexible" in his teaching of Dhamma? Or do the suttas show the Buddha wished his teachings to remain consistent & clearly representative of what he taught?

There is plenty of textological evidence showing that DN and MN were composed long after AN and SN, and most likely DN & MN were made by compiling pieces of AN & SN.
– Andrei Volkov♦Feb 15 '19 at 22:15

Why don't you post some of this evidence in an answer. Thanks
– DhammadhatuFeb 15 '19 at 22:16

My desire to be right is not strong enough for that amount of tedious mechanical work copy/pasting quotes for you.
– Andrei Volkov♦Feb 15 '19 at 22:17

DD It is even questionable whether every Sutta besides the Digha Nikayas are as authentic as portrayed. I don't believe that the Buddha repeated himself a thousand of times per meeting, nor is it believable that Buddha had psychic powers to hear other's conversations. That's just too god-alike. Same could be said about the passing away of the Buddha that he entered the Jhanas and left them. This is probably more likely, but again shows a god alike character portrayed by monks. It was also said that a lot of students reached certain levels of enlightenment just by mere listening. Unlikely imo.
– ValFeb 17 '19 at 8:48

But then again, whether the aforementioned things really occured or not is actually not that important. It's rather important whether there are inconsistencies in the teaching, to see the context in which Buddha was living (a Brahmin influenced society), and finally, if the teaching works. In the end it's personal interpretation anyways, and if one apriori believes in unverifiable teachings it is hard to challenge those people adhering to such beliefs to begin with.
– ValFeb 17 '19 at 8:49

6 Answers
6

Is there any evidence in the suttas showing the Buddha was "flexible" in his teaching of Dhamma?

He was not a little flexible when one spoke A-dhamma but did not limit the Tataghata to his speech at the same time, as the only that should be taken as that of the Tataghata.

Once the Budddha rebuked some who told that another does teach something the Buddha did not say by "What ever Dhamma a Noble one speaks, it is the Dhamma of the Tatagatha". One may google it ... or ask a monk for details if able to leave house. It was, btw, on the teaching one gave, that one should seriously reflect one's own attainments and that of others, periodical!

[off (ordinary) cause: this is not given for trade, stacks, exchange or Buddh-ism and other binding purposes for the world but dedicated for refuge toward liberation]

It was the Buddha who spoke the words of the DN, but it was compiled, collated, arranged and rearranged by the Sangha centuries after his passing. The DN was not fabricated. Also the Buddha certainly never said, "Today I'm going to speak Digha Nikaya 1".

The Sangha may have rearranged the suttas into the sequence of the DN today with intention to define the difference between the Buddha's teachings and other religions (in DN 1), the role of the monks (in DN 2), the role of the lay followers (in DN 31), the continuation of Buddhism after the Buddha passes away (in DN 16) etc. There might have been some specific intention behind this arrangement, perhaps to create a constitution of sorts.

OP: Is there evidence (such as contradictions with other suttas) suggesting the Buddha did not speak the Digha Nikaya?

There is no evidence of contradiction between the nikayas.

OP: In there any evidence in the suttas where the Buddha said he would teach a different modified Dhamma ("propaganda") merely for the
purpose of converting Brahmins & other outsiders?

No. The Buddha taught the same thing to monks, lay followers and outsiders, according to SN 42.7:

“To me, the monks and nuns are like the good field. I teach them the
Dhamma that’s good in the beginning, good in the middle, and good in
the end, meaningful and well-phrased. And I reveal a spiritual
practice that’s entirely full and pure. Why is that? Because they live
with me as their island, protection, shelter, and refuge.

To me, the
laymen and laywomen are like the average field. I also teach them the
Dhamma that’s good in the beginning, good in the middle, and good in
the end, meaningful and well-phrased. And I reveal a spiritual
practice that’s entirely full and pure. Why is that? Because they live
with me as their island, protection, shelter, and refuge.

To me, the
ascetics, brahmins, and wanderers who follow other paths are like the
poor field, the bad ground of sand and salt. I also teach them the
Dhamma that’s good in the beginning, good in the middle, and good in
the end, meaningful and well-phrased. And I reveal a spiritual
practice that’s entirely full and pure. Why is that? Hopefully they
might understand even a single sentence, which would be for their
lasting welfare and happiness.

So, he did not teach followers and non-followers differently..

OP: Is there any evidence in the suttas showing the Buddha was "flexible" in his teaching of Dhamma? Or do the suttas show the Buddha
wished his teachings to remain consistent & clearly representative of
what he taught?

WHAT he taught was the same, but HOW he taught it, could be different according to the Kesi Sutta (AN 4.111):

"Kesi, I train a tamable person [sometimes] with gentleness,
[sometimes] with harshness, [sometimes] with both gentleness &
harshness.

"In using gentleness, [I teach:] 'Such is good bodily conduct. Such is
the result of good bodily conduct. Such is good verbal conduct. Such
is the result of good verbal conduct. Such is good mental conduct.
Such is the result of good mental conduct. Such are the devas. Such
are human beings.'

"In using harshness, [I teach:] 'Such is bodily misconduct. Such is
the result of bodily misconduct. Such is verbal misconduct. Such is
the result of verbal misconduct. Such is mental misconduct. Such is
the result of mental misconduct. Such is hell. Such is the animal
womb. Such the realm of the hungry shades.'

"In using gentleness & harshness, [I teach:] 'Such is good bodily
conduct. Such is the result of good bodily conduct. Such is bodily
misconduct. Such is the result of bodily misconduct. Such is good
verbal conduct. Such is the result of good verbal conduct. Such is
verbal misconduct. Such is the result of verbal misconduct. Such is
good mental conduct. Such is the result of good mental conduct. Such
is mental misconduct. Such is the result of mental misconduct. Such
are the devas. Such are human beings. Such is hell. Such is the animal
womb. Such the realm of the hungry shades.'"

"And if a tamable person doesn't submit either to a mild training or
to a harsh training or to a mild & harsh training, what do you do?"

"If a tamable person doesn't submit either to a mild training or to a
harsh training or to a mild & harsh training, then I kill him, Kesi."

"But it's not proper for our Blessed One to take life! And yet the
Blessed One just said, 'I kill him, Kesi.'"

"It is true, Kesi, that it's not proper for a Tathagata to take life.
But if a tamable person doesn't submit either to a mild training or to
a harsh training or to a mild & harsh training, then the Tathagata
doesn't regard him as being worth speaking to or admonishing. His
knowledgeable fellows in the holy life don't regard him as being worth
speaking to or admonishing. This is what it means to be totally
destroyed in the Doctrine & Discipline, when the Tathagata doesn't
regard one as being worth speaking to or admonishing, and one's
knowledgeable fellows in the holy life don't regard one as being worth
speaking to or admonishing."

You may also wish to scrutinize the Buddhist Councils "convention" and their outcomes to ascertain the level of "authenticity"/preservation of the Buddha's teachings.

In there any evidence in the suttas where the Buddha said he would
teach a different modified Dhamma ("propaganda") merely for the
purpose of converting Brahmins & other outsiders?

In the suttas, the Buddha pretty much taught the same thing to everyone. There was no "special" teachings for select groups of disciples or audiences.

Is there any evidence in the suttas showing the Buddha was "flexible"
in his teaching of Dhamma? Or do the suttas show the Buddha wished
his teachings to remain consistent & clearly representative of what
he taught?

The Buddha had over 40 years to teach. So, he did teach the same thing in many ways depending on the intellectual level of his listeners. And he had 40 years to admonish/correct disciples who developed wrong views of his teachings.

Is there any evidence in the suttas showing the Buddha was "flexible" in his teaching of Dhamma? Or do the suttas show the Buddha wished his teachings to remain consistent & clearly representative of what he taught?

I think the Buddha explained Dhamma, and that the explanation was adapted according to who he was addressing.

This footnote to the Sigalovada sutta, for example, suggests that "worshipping the six directions" was a Vedic ritual, and the Buddha takes advantage of the occasion to teach a different doctrine.

But that's not to say that the doctrine is incompatible with the doctrine taught in other suttas (but it is rather different to the Rhinoceros sutta for example).

Or according to Piya Tan the Aggañña Sutta (DN 27) is addressed to Brahmins (i.e. probationary monks who were Brahmins) and is perhaps a parody of Brahminical creation myths. The subject matter is "fantastic" but the doctrine (i.e. that the fall is due to craving "nourishment") is again not incompatible with other suttas.

I don't mean to generalise about the whole Digha Nikaya. But you ask whether he was "flexible, or, wished to remain consistent" -- perhaps he was flexible 'and' remained consistent.

I think that's famously part of his ability as Buddha, i.e. to know how to teach different people.

One of the suttas which shows that "the Buddha wished his teachings to remain consistent & clearly representative of what he taught" is (perhaps ironically, given the question) the Maha-parinibbana Sutta i.e. DN 16 -- which includes the "four great references" and so on.

People who can understand the noble truth from tipitaka must can deconflict every uncleared word of tipitaka

... so I presume it's possible that, I think it's the opinion of e.g. Thai/Buddhist scholars that, the teachings are consistent.

In my opinion though (I don't know about Bonn's) to say "they're consistent" might need some flexibility (and good-will, and if not 'faith' exactly then at least a willingness to listen) in how you interpret them -- words have a range of meanings, they're often used metaphorically, part of the doctrine is not being over-attached to specific views, I think they are adapted/suited to the specific audience (often a reply to a specific question), etc.

Perhaps my opinion (above) is overly rosy though, and there are bits (of suttas) -- not all in the Digha Nikaya -- which I overlook or ignore. I don't think I'd want to argue the doctrinal details you identify in your answer -- some of your comments (e.g. about namarupa) I just don't understand or have no opinion about; and some (e.g. about DN 27) isn't how I read that sutta (and I'm content with my reading of it but I'm not sure it would benefit anyone to try to argue about it with you).

The Digha Nikaya has so many contradictions. I might take days so to finish this post.

DN 11 (which similar to MN 49 is anti-Brahmanistic propaganda addressed to Brahmans) refers to a 'consciousness without feature that occurs when nama-rupa is destroyed'. However, the core suttas (MN 9; SN 12.65; SN 12.67; etc) say consciousness cannot exist without nama-rupa. This is a contradiction, which supports the claim of the Western scholars that the DN was composed as propaganda for converting Brahmans. It also supports the intelligent view that 'nama-rupa' in the DN has the old Brahmanistic meaning rather than the Buddhist meaning. There can be a consciousness without 'naming-forms' but there cannot be a consciousness without mind-body.

DN 15 defines 'nama-rupa' in the old Brahmanistic way; and not the new Buddhist way found in SN 12.2; MN 9, etc. This is a contradiction.

In AN 3.61, the Buddhist lists the sense bases as one of his four teachings. But DN 15 does not even include the sense bases. To have nine conditions for Dependent Origination but exclude the sense bases is a contradiction.

DN 15 does not define 'aging & death' and gives a biological rather than mental description of 'jati'. SN 12.2 defines 'jati' as the production of 'beings' ('satta'). SN 5.10 and SN 23.2 define 'a being' as a view or idea. Therefore, DN 15 does not provide for a proper interpretation of 'jati'.

DN 15 does not define the six-fold consciousness but refers to a consciousness entering in a womb; which is not taught anywhere else in the suttas. This is a contradiction.

DN 27 gives a biological origin of the world account; where SN 12.44 and AN 4.45 say the world originates from sense contact. This is a contradiction.

You quote the Sigalovada sutta though, don't you? And it is introduced as an antithesis to a Brahmanistic ritual.
– ChrisW♦Feb 17 '19 at 9:30

The topic is about the DN not about "me". The above comment appears to be "identitarian Cultural Marxism" that focuses upon "personalities" rather than about Buddhism.
– DhammadhatuFeb 19 '19 at 0:09

The way the question is phrased seems to be writing off the whole DN, I guess I'm wondering whether you intended that. I'm not sure where the title comes from (i.e. that the DN isn't buddha vacana) given the quotes (which maybe don't imply that). Also you said this answer is incomplete -- I was curious to know your view (if you have one to share) of DN 31 (and also DN 16). But I can delete my comment, if you find it offensive or something.
– ChrisW♦Feb 19 '19 at 0:18

And the answer is:Where vinanna is signless, boundless, all-luminuous,That's where earth, water, fire and air find no footing,There both long and short, small and great, fair and foul,There namarupa are wholly destroyed,_With the cessation of vinanna, this is all destroyed.

You missed the last line - the vinanna's cessation.

Many experienced human meditators, while they are still alive and kicking, have "seen" this vinanna that is signless, boundless, luminous. It can never be seen via thinking and reading. And it is "there", eventually, and finally, at the expiration of that individual's present karmic "life forces", that the final liberation is won, i.e., the next namarupa cannot come into being.

I do not wish to cause ill-will and unease by writing point-by-point counter-reply to the other statements you had made in your answer to your own question.

However, should your intention be skillful, i.e., to know others' opinion so that you have some answers to your many questions, you may wish to ask your questions separately. On the contrary, if you had come to your own conclusions, this forum may not be the correct place as it is a question-answer platform.

My apology for offering an unsolicited advice/opinion. Upon reading your reply to your own question, I know that many of your doubts can be cleared with meditation practise. Thereafter, you will be too "occupied" trying to match your experience/insight with the Abhidhamma. Ehipassiko.